You might be right but theres a few things to look at here...

First the vials and packaging are of good quality, they don't tend to spend that much on packaging just to then put shit into them...

Second ive used that deca as ive said and it was good...

Third if you trust your source then there shouldnt be an issue...

Fourth if you need a guaranteed answer then send it to me, i shall run it for 10 weeks and then let you know...